期刊
ECOLOGY LETTERS
卷 12, 期 4, 页码 324-333出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1461-0248.2009.01291.x
关键词
Biodiversity; climate change; Eocene; Formicidae; latitudinal gradient
类别
资金
- DOE-NICCR
- DOE-PER [DE-FG02-08ER64510]
- National Science Foundation [DEB-0640015]
Although many taxa show a latitudinal gradient in richness, the relationship between latitude and species richness is often asymmetrical between the northern and southern hemispheres. Here we examine the latitudinal pattern of species richness across 1003 local ant assemblages. We find latitudinal asymmetry, with southern hemisphere sites being more diverse than northern hemisphere sites. Most of this asymmetry could be explained statistically by differences in contemporary climate. Local ant species richness was positively associated with temperature, but negatively (although weakly) associated with temperature range and precipitation. After contemporary climate was accounted for, a modest difference in diversity between hemispheres persisted, suggesting that factors other than contemporary climate contributed to the hemispherical asymmetry. The most parsimonious explanation for this remaining asymmetry is that greater climate change since the Eocene in the northern than in the southern hemisphere has led to more extinctions in the northern hemisphere with consequent effects on local ant species richness.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据